Hi Mick
I do this everyday for 5 years, there is only 1 product i use and it never fails.
Brillo Degreaser.
It comes in 5ltr, which you dilute down in spray bottles, it is excellent for grease, smoke stained PVC windows, doors, tiles.
I use it in student lets, spray on and watch the grease & smoke just melt off.
I usually scourer the stubborn marks, wipe up with kitchen towel.
Good luck
Martin
